Here's one that involves Electricity.

Last period of classes, in 9th grade, as we were waiting for the bell, I stuck my finger in a four-way lightswitch, that had one of the switches missing, in an attempt to shut the other light off from the inside.

I had my back turned to the class, but, after sticking my finger in, I floated backwards and saw my whole class, with my teacher sitting in front, but the angle was like I was hanging from the ceiling (on the opposite end of the room from where I was standing).

The next thing I knew, I was in front of the wall, again.